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ANNOTATED GAME

A fun checkmate?
palaisipan_23 (1792) vs. another_ken (1709)
Annotated by: another_ken (1200)
Chess opening: QGD Slav defence (D10)
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This game is remarkable for its checkmate. See if you can figure out mate (win for Black) in 7 from White's 22. Kh2 without looking! This game gave both players a lot of joy.
1. d4
This game is remarkable for its checkmate. See if you can figure out mate (win for Black) in 7 from White's 22. Kh2 without looking! This game gave both players a lot of joy.

 
1... d5 2. c4 c6 3. e3 Bf5 4. Nc3 Nf6 5. Nf3 e6 6. h3 Nbd7 7. Bd3
(Given 6. h3 is this in keeping?)

 
7... Be4
(This ensures that any exchange of minor pieces leaves Black with the favourable position -- a black pawn on e4 suits Black very well.)

 
8. O-O Be7 9. Bxe4 Nxe4 10. Nxe4 dxe4 11. Nd2 e5 12. Nxe4
(A shameless pawn grab! The pawn on e4 was fairly poisonous. The knight is in no man's land...)

 
12... f5 13. Nc3 O-O 14. b3
(I wouldn't recommend dxe either.)

 
14... f4 15. Qg4
(Perhaps Qf3 is better, stopping f4-f3 for the time being.)

 
15... Rf6 16. Bb2 Rg6 17. Qf5
(Qf3 is definitely better here.)

 
17... Qc7 18. d5
Not sound. This frees c5 for Black's knight.

 
18... Rf8 19. Qd3
(Again not sound. With ..Knc5 to come, White concedes a tempo. As it happens, White cannot prevent his demise -- there is a clear mating plan for Black now.)

 
19... Nc5
(This is not so much to develop as to free d7 for Black's queen.)

 
20. Qd2 f3
(Displacing the pawn on g2, and weakening the pawn on h3)

 
21. g3 Qd7 22. Kh2
[PUZZLE: Without looking, can you figure out mate in 7 moves?]

 
22... Qxh3+
!

 
23. Kxh3 Rh6+ 24. Kg4 Rh2
White resigns here, for it is checkmate upon ..h7-h5#